Pull down bed with automatic locking device

Abstract

A pull down bed with automatic locking device has a movable framework, which constitutes a mattress frame, and is hinged to a container body, which constitutes a piece of furniture, so as to define a closed position, in which said mattress frame is substantially inside the piece of furniture, and an open position, for use as a bed, in which the mattress frame is in a horizontal position and rests on the ground by means of two feet. The mattress frame is hinged to the piece of furniture at one end and has its feet at the other end. The pull down bed includes a device for locking said mattress frame in the closed or horizontal position, which is actuated by an actuation device, which includes the feet.

The invention claimed is: 
     
       1. A pull down bed, with automatic locking device, comprising a movable framework, which constitutes a mattress frame and is hinged to a container body, which constitutes a piece of furniture, so as to define a closed position, in which said mattress frame is substantially inside said piece of furniture, and an open position, for use as a bed, in which said mattress frame is in a horizontal position and rests on the ground by means of feet, wherein:
 said mattress frame is hinged to said piece of furniture at one end and has said feet at the other end; 
 said mattress frame is hinged to said piece of furniture by means of a pair of mounting plates which are applied to sides of said piece of furniture; 
 the pull down bed further comprises a locking device for locking said mattress frame in said closed and horizontal position, said locking device is actuated by an actuation device, said actuation device comprises said feet; 
 at least one of said plates is provided with two holes, an upper hole and a lower hole, which allow the locking of said mattress frame in said horizontal and closed position; 
 said locking device comprises a pin with a rack which is associated with said mattress frame, said pin with rack being inserted, in an inactive position, in one of said holes, the lower one or the upper one, depending on whether the mattress frame is respectively in the closed or open position; 
 said pin is actuatable by said actuation device in order to clear said holes and allow the passage of said mattress frame from one position to the other, the rack of said pin with rack being engaged by a gear, which is connected to said actuation device by means of a transmission cable, said actuation device comprising at least one of said feet, such foot acting as an actuation lever for a hook and as a handle for folding said mattress frame; 
 a portion of said foot pivoted to said mattress frame has three radial slots for locking said foot in the various positions for use; 
 said hook is hinged to said mattress frame and is adapted to engage said slots of said foot in order to lock it in the various positions; 
 said hook transmits the movement to said locking device through said transmission cable; 
 when one acts on said foot, said hook is turned, said hook rotates and pulls said transmission cable, said transmission cable moves said gear of said pivot with rack, and said gear moves said pivot with rack which, by retracting in contrast with a contrast spring, exits from said hole of said plate and releases the mattress frame. 
 
     
     
       2. The pull down bed according to  claim 1 , wherein said mounting plates are applied to the internal sides of shoulders of said piece of furniture; each of said mounting plates is inserted in a contoured recess, which is provided in a respective shoulder and is flush with a surface of the respective shoulder. 
     
     
       3. The pull down bed according to  claim 2 , wherein each said mounting plate is constituted by an upright, a horizontal crossmember and a curved portion; said horizontal crossmember has a seat that accommodates a rotation pivot which is jointly connected to said mattress frame. 
     
     
       4. The pull down bed according to  claim 1 , wherein each foot comprises a height adjustment system. 
     
     
       5. The pull down bed according to  claim 1 , wherein said hook is designed to lock in the closure position said mattress frame by engaging a pin that is present on each shoulder of said piece of furniture. 
     
     
       6. The pull down bed according to  claim 2 , further comprising a gas spring, which has one end hinged to said plate and the other end hinged to said mattress frame in a position that is proximate to the locking device; said gas spring supports the weight of said mattress frame and of the mattress that is associated therewith. 
     
     
       7. The pull down bed according to  claim 1 , wherein said mattress frame is formed from a folded sheet metal. 
     
     
       8. A pull down bed, with automatic locking device, comprising a movable framework, which constitutes a mattress frame and is hinged to a container body, which constitutes a piece of furniture, so as to define a closed position, in which said mattress frame is substantially inside said piece of furniture, and an open position, for use as a bed, in which said mattress frame is in a horizontal position and rests on the ground by means of feet, wherein:
 said mattress frame is hinged to said piece of furniture at one end and has said feet at the other end; 
 said mattress frame is hinged to said piece of furniture by means of a pair of mounting plates which are applied to sides of said piece of furniture; 
 the pull down bed further comprises a locking device for locking said mattress frame in said closed and horizontal position, said locking device is actuated by an actuation device, said actuation device comprises said feet; 
 at least one of said plates is provided with two holes, an upper hole and a lower hole, which allow the locking of said mattress frame in said horizontal and closed position; 
 said locking device comprises a pin with a rack which is associated with said mattress frame, said pin with rack being inserted, in an inactive position, in one of said holes, the lower one or the upper one, depending on whether the mattress frame is respectively in the closed or open position; and 
 said pin is actuatable by said actuation device in order to clear said holes and allow the passage of said mattress frame from one position to the other. 
 
     
     
       9. The pull down bed according to  claim 8 , wherein rack of said pin with rack is engaged by a gear, which is connected to said actuation device by means of a transmission cable. 
     
     
       10. The pull down bed according to  claim 8 , wherein each foot comprises a height adjustment system. 
     
     
       11. The pull down bed according to  claim 8 , further comprising a gas spring, which has one end hinged to said plate and the other end hinged to said mattress frame in a position that is proximate to the locking device; said gas spring supports the weight of said mattress frame and of the mattress that is associated therewith. 
     
     
       12. The pull down bed according to  claim 8 , wherein said mattress frame is formed from a folded sheet metal.